Obruchev

03128, 1942 RG1, 1942RG1, 1952 JE, 1952JE, 1976 YU4, 1976YU4, 1979 FJ2, 1979FJ2, 1979 HS2, 1979HS2, 1981 VG2, 1981VG2, J42R01G, J52J00E, J76Y04U, J79F02J, J79H02S, J81V02G

All data for this body: [vot]

MPC data
Name (number) Obruchev (3128)
a 3.11386
e 0.15758
i / sin(i) 2.9381 / 0.05126
q 2.62317
Q 3.60454
ω 188.0004
Node 102.3461
m 55.0713
n 0.1794
Epoch 2460800.5
nobs 4347
nopp 38
Years observed 1942-2025
rms 0.68
Best values
[raw, vot]

Value Standard error
Parent Themis (24)
 
ap 3.116
ep 0.155
sin(ip) 0.029
G 0.150
H 12.260
Mass
D 20.50 0.201
pV 0.071 0.0111
Value
Rotational Period 12.640
Period quality 2
Spectral Class C
Spectral Class Score 5.000
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
24 Themis 0 Themis Novakovic 2019EPSC...13.1671N HCM
24 Themis 602 Themis -0.3100 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1157 0.1549 0.0291 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
20.40 0.207 0.207 Masiero 2011ApJ...741...68M NEATM
22.25 0.880 0.880 Usui 2011PASJ...63.1117U NEATM
22.47 4.490 4.490 Ali-Lagoa 2018A&A...612A..85A NEATM
23.32 4.660 4.660 Ali-Lagoa 2018A&A...612A..85A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.048 0.0190 0.0190 Ali-Lagoa 2018A&A...612A..85A NEATM
0.052 0.0210 0.0210 Ali-Lagoa 2018A&A...612A..85A NEATM
0.107 0.0180 0.0180 Masiero 2011ApJ...741...68M NEATM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2023-12-94 MPC-2023-12-94 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
12.26 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
12.642 2 Synodic Erasmus 2020ApJS..247...13E Lightcurve
12.642 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
12.64419 2 Sidereal Durech 2020A&A...643A..59D Model
12.6442 2 Sidereal Durech 2023A&A...675A..24D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C Tholen VIS Lazzaro 2004Icar..172..179L SPEC
Cb Bus VIS Lazzaro 2004Icar..172..179L SPEC
P 0.990000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC